Selection of modulation and codes for deep-space optical communications

Jon Hamkins; Bruce Moision

doi:10.1117/12.528434

16 June 2004 Selection of modulation and codes for deep-space optical communications

Jon Hamkins, Bruce Moision

Proceedings Volume 5338, Free-Space Laser Communication Technologies XVI; (2004) https://doi.org/10.1117/12.528434
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

We describe several properties of deep space optical channels that lead to an appropriate selection of modulation format, pulse position modulation (PPM) order, error control code rate, and coding scheme. The selection process is motivated by capacity considerations. We compare the Shannon limit to the performance of Reed-Solomon codes and convolutional codes concatenated with PPM and show that, when iteratively decoded, concatenated convolutional codes operate approximately 0.5 dB from capacity over a wide range of signal levels, about 2.5 dB better than Reed-Solomon codes.

Citation Download Citation

Jon Hamkins and Bruce Moision "Selection of modulation and codes for deep-space optical communications", Proc. SPIE 5338, Free-Space Laser Communication Technologies XVI, (16 June 2004); https://doi.org/10.1117/12.528434

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